statefun-examples/statefun-shopping-cart-example/src/main/java/org/apache/flink/statefun/examples/shoppingcart/ShoppingCartModule.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.flink.statefun.examples.shoppingcart;

import com.google.auto.service.AutoService;
import java.util.Map;
import org.apache.flink.statefun.examples.shoppingcart.generated.ProtobufMessages;
import org.apache.flink.statefun.sdk.io.EgressSpec;
import org.apache.flink.statefun.sdk.io.IngressSpec;
import org.apache.flink.statefun.sdk.kafka.KafkaEgressBuilder;
import org.apache.flink.statefun.sdk.kafka.KafkaIngressBuilder;
import org.apache.flink.statefun.sdk.spi.StatefulFunctionModule;

@AutoService(StatefulFunctionModule.class)
public class ShoppingCartModule implements StatefulFunctionModule {
  @Override
  public void configure(Map<String, String> globalConfiguration, Binder binder) {
    // bind functions
    binder.bindFunctionProvider(Identifiers.USER, unused -> new UserShoppingCart());
    binder.bindFunctionProvider(Identifiers.INVENTORY, unused -> new Inventory());

    // For ingress and egress pretend I filled in the details :)

    IngressSpec<ProtobufMessages.RestockItem> restockSpec =
        KafkaIngressBuilder.forIdentifier(Identifiers.RESTOCK).build();

    binder.bindIngress(restockSpec);

    binder.bindIngressRouter(Identifiers.RESTOCK, new RestockRouter());

    EgressSpec<ProtobufMessages.Receipt> receiptSpec =
        KafkaEgressBuilder.forIdentifier(Identifiers.RECEIPT).build();

    binder.bindEgress(receiptSpec);
  }
}